Gravity LTR390 UV Light Sensor I2C and UART

This Gravity UV light sensor from DFRobot uses the LTR390-UV-01 to measure both UV light in the range 280 to 430 nm and visible ambient light. A microcontroller on the board converts the readings and outputs them via I2C or UART; the interface is selected with a DIP switch. The sensor works on 3.3 V and 5 V boards.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces
• Gravity IO Expansion Shield for Arduino V7.1

Features:

• UV measurement 280 to 430 nm (UVA, UVB) and ambient light 450 to 700 nm
• Resolution 13 to 20 bits, gain 1, 3, 6, 9 or 18 adjustable
• Interrupt with programmable upper and lower threshold
• Ambient light with spectral response close to the human eye
• I2C or UART, selected with DIP switch
• 4-pin Gravity connector, 3.3 V and 5 V

Application Examples:

• Outdoor UV measurement and display of UV exposure
• Brightness measurement for lighting control
• Weather and light experiments in class

Documentation:

• Wiki DFRobot SEN0540
• Example code UV light I2C for Arduino (DFRobot Wiki)
• Datasheet (PDF)
• Schematic (PDF)
• GitHub library DFRobot_LTR390UV

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0540
• Sensor: LTR390-UV-01
• Operating voltage: 3.3 to 5 V DC
• Operating current: about 2.73 mA (18 bits, 100 ms)
• Interface: I2C or UART
• I2C address: 0x1C
• UV response: 280 to 430 nm
• Ambient light: 450 to 700 nm
• Output: digital
• Pins: D/T (SDA/TXD), C/R (SCL/RXD), - (GND), + (VCC)
• Dimensions: 32 × 27 × 7.24 mm
• Weight: 14 g

Scope of Delivery:

• 1× Gravity LTR390 UV light sensor
• 1× Gravity cable I2C/UART 4-pin, PH2.0 to Dupont female, 30 cm